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Information × Registration Number 0305U001403, 0104U003288 , R & D reports Title Theory and methods of dynamic processes in elastic system under nonstationary loadings analysis popup.stage_title Створення теоретичних основ аналізу динамічних процесів у пружних елементах при нестаціонарних навантаженнях детермінованої та стохастичної природи Head Bazhenov V.A., Registration Date 11-02-2005 Organization Kiev National University of bildiny and tecture popup.description2 In the course ot scientific research the short literature review оn the topic was fullfiled as well as , the analysis of references and state of the problem.The theoretical base for analisis of nonstationary dynamic processes, which occur in elastic systems under deterministic and stochastic loads was developed. Identical models of nonstationary stochastic dynamic excitation were developed for 2-D and 3-D problems, as well as for spaces with complicated structure, which account for the characteristics of real elastic systems deformation. One of the efficient methods of transition from temporary space into frequency one was developed with the use the method of quick Fourie transformationr. The new numerical approach to vibroimpact process analysis in elastic systems, based on method of continuation of decision on parameter, was developed. The shock interaction is modeled with the help of the putting of nonlinear elastic force to contacting bodies. The efficient method for the loading curvesof the vibroimpact processes in the elastic systems constructions was developed. A new finite element scheme in the general curvilinear coordinate system, based on vector approximation of finite element form function was marketed. The scheme possesses advantages of quick convergence and convenience of governing equations construction. Product Description popup.authors popup.nrat_date 2020-04-02 Close